Fluphenazine Decanoate is a long-acting form of fluphenazine that is used to treat certain mental/mood problems (chronic schizophrenia). Fluphenazine decanoate is usually used in patients who have benefited from regular doses of short-acting forms of fluphenazine and who may benefit from long-term (maintenance) treatment with less frequent dosing. Fluphenazine decanoate is the decanoate ester of a trifluoromethyl phenothiazine derivative. It is a highly potent behavior modifier with a markedly extended duration of effect. The Fluphenazine Decanoate is very useful and made for medical uses.